Synthesis and characterization of trivalent RE (RE = Eu3+, Dy3+, Ce3+) doped new Ca3Al2Si3O12materials for NUV-wLEDs

RE3+ (RE3+ = Eu3+, Dy3+ and Ce3+) doped Ca3Al2Si3O12 phosphors are prepared at 600 °C by a combustion method. The phase and crystallanity of the synthesized materials is investigated by x-ray diffraction. Luminescence characteristics were analyzed by using photoluminescence spectra. Here Ca3Al2Si3O12: Eu3+ phosphor shows strong emission bands at 581, 592, 615 under 396 nm excitation wavelengths. Dy3+ emission band is observed at, 437, 484, 577 under 348 nm excitation wavelength. Whereas Ce3+ shows isolated blue emission bands at 440 nm keeping excitation wavelength constant at 355 nm. Also spin–orbit splitting difference in 2F7/2 and 2F5/2 ground state level of Ce3+ ions is studied using curve fitting analysis. Thus, the present phosphor may applicable for near ultraviolet excited white light emitting diode.